Best March Madness Betting Promos & Bonuses 2025: Over 3K In Bonuses

Caesars Sportsbook March Madness Promo

The Caesars Sportsbook March Madness promo is a sports betting bonus. When you sign up with the Caesars Sportsbook promo code ROTODYW, you get 10 100% profit boosts after a first bet of $1 or more.

Fanatics Sportsbook March Madness Promo

When you sign up with the Fanatics Sportsbook promo, new users can enjoy up to $1,000 in No Sweat Bets during their first 10 days. Place a daily first bet of up to $100 for ten consecutive days, and Fanatics Sportsbook will match each wager you make.

bet365 March Madness Promo

New users can sign up with the bet365 bonus code ROTOWIRE to claim a $1,000 First Bet Safety Net as a welcome offer. If your first bet doesn't win, you'll receive up to $1,000 in bonus bets. Alternatively, users can choose to claim the Bet $5, Get $150 in bonus bets sign-up bonus. But be mindful that you can only redeem one of the two welcome offers. 

DraftKings March Madness Promo

The DraftKings March Madness promo is arguably the top promo on the market today. The DraftKings promo code provides new users with a Bet $5, Get $200 in bonus bets promotion. The bonus bets, eight $25 bet credits, are yours, win or lose.

BetMGM March Madness Promo

With the BetMGM bonus code ROTOSPORTS, you can get a first bet offer for up to $1,500 to use on March Madness odds today. This welcome offer gives you up to $1,500 in bonus bets if your first bet loses. 

FanDuel March Madness Promo

The FanDuel March Madness promo gives new users a terrific welcome offer. Simply sign up via the FanDuel promo code link on this page and get $200 in bonus bets when you bet $5. You get the bonus, win or lose.

BetRivers March Madness Promo

The BetRivers March Madness promo gives new customers a 2nd Chance Bet, up to $500. Use the BetRivers bonus code for a $500 first-bet welcome offer. If your first bet loses, you are reimbursed for the full amount in bet credits.

This is one of the best betting promotions as you can use it on any sports betting market available at BetRivers.

Hard Rock Bet March Madness Promo

New users can claim the Hard Rock Bet promo code that gives them up to $100 in bonus bets. Sign up, make a qualifying deposit, and place your first bet of $5 or more to unlock the Bet $5, Get $100 in bonus bets deal. The $100 bonus is distributed as five $20 bonus bet credits. In some locations, you get the bonus regardless of the outcome of your first wager. In other locations, you get the bonus bets only if your opening bet settles as a loss.

ESPN BET March Madness Promo

The ESPN BET promo code ROTO gives new users a $1,500 first-bet welcome offer. You only get bonus bets if your first bet loses. 

You can claim March Madness sportsbook promotions by following a few simple steps.

They are as follows:

1. Click the link on this page to claim the March Madness sportsbook promo you'd like to opt into. Once redirected, click the button that reads "Sign Up," "Register," or "Join Now."
2. Fill in all pertinent information including your name, address, date of birth, phone number, email, and the last four digits of your SSN. This is also where you'll add the March Madness sportsbook promo code or bonus code to redeem the welcome offer.
3. Choose a username and password, where applicable, and complete the security questions and answers. Agree to all terms and conditions, and submit the registration form.
4. If requested, upload scans of documents to help verify your identity for Know Your Customer (KYC) checks.
5. Make a qualifying deposit and place your first wager on the March Madness betting market of your choice.

After you've completed the above sign-up process, you can repeat it to claim additional sports betting site welcome offers. The more March Madness promo codes you redeem, the more bonus funds you'll have to use on March Madness bets.

As this is a nationwide event, it's important to know in which states March Madness sports betting promos are available for use.

Here's a rundown of the states where you can take advantage of online sports betting March Madness betting promos:

• Arizona
• Colorado
• Connecticut
• Illinois
• Indiana
• Iowa
• Kansas
• Kentucky
• Louisiana
• Maryland
• Massachusetts
• Michigan
• Mississippi
• New Jersey
• New York
• North Carolina
• Ohio
• Oregon
• Pennsylvania
• Rhode Island
• Tennessee
• Virginia
• West Virginia
• Wyoming

Find The Best Welcome Offer

Finding the best welcome offer for March Madness betting is important as "best" can mean a lot of different things to sports bettors. If you're looking for bonus bets with a small initial deposit, consider a potential DraftKings offer for March Madness, which might be to get $200 in bonus bets. Or if you want a March Madness betting promo first bet offer, then the BetMGM, Caesars Sportsbook, or the FanDuel promo could best fit your needs.

Play With The Best Odds

If you play with the best odds, there's a better chance you profit in the long run. By signing up with multiple sports betting sites and claiming multiple March Madness sportsbook bonus codes, this allows you to shop the odds to find the best ones for the specific wager you're looking to make.

Whether it is an individual game spread or a futures price, having the best odds is a true advantage when placing March Madness bets.

Chance To Build Your Bankroll With Bonus Funds

These March Madness promos give you the chance to build your bankroll with bonus funds, right off the bat. Whether you're joining via a bet and get or simply receive bonus funds as reimbursement for a lost first bet, bonus funds can help supplement your bankroll, rather than making additional deposits.

As long as you are using bonus funds, which typically come with a 1x play through requirement, your bankroll should remain in good shape throughout March Madness 2025.

March Madness betting bonuses come in all shapes and sizes. These are the most common types of March Madness betting promotions being offered currently:

Bonus Bets

Bonus bets are funds you'll receive after opting into any and all of the best March Madness betting promos. They typically come with a 1x playthrough requirement. The DraftKings March Madness promo might allow you to bet $5 to grab $200 in bonus bets. You can use these to wager on anything, such as CBB championship odds.

Deposit Match

A deposit match is when a sports betting site matches the funds you are depositing in the form of a bonus. For example, if there is a 100% deposit match, and you deposit $100, you'll receive an additional $100 in funds to place March Madness bets with.

Odds Boosts

Odds boosts move the odds in favor of the sports bettor during March Madness. Hypothetically, the top-ranked Houston Cougars could have +650 to win the national title. But with an odds boost, you could get them at +1000 odds.

Bet Credits

Bet credits are just another term for bonus bets. You'll typically receive bet credits from a March Madness betting promo, if your first bet loses. For example, if you place a $1,000 first bet with BetMGM, and it is graded as a loss, you'll get $1,000 worth of bet credits as reimbursement for the losing wager.

First-Bet Bonuses

First-bet bonuses are provided when you sign up with the March Madness sports betting promotions highlighted on this page. They typically give a refund, in the form of bonus bets, if your opening wager settles as a loss.

There are lots of great March Madness promos to choose from. Each provides different March Madness bonuses, adding up to thousands in bonus funds to use on March Madness bets. Whether you decide to sign up for a sportsbook for the first time or add another to your sports betting portfolio, getting started using March Madness promos will give you the opportunity to use bonus bets to place wagers throughout the tournament.

Sign up now using the March Madness sportsbook promos in this article to reap the benefits and claim the the best March Madness 2025 bonuses on the market today.